CN105554783B

CN105554783B - Air interface test device, system and air interface test method

Info

Publication number: CN105554783B
Application number: CN201410614068.9A
Authority: CN
Inventors: 陈侃浩
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2014-11-03
Filing date: 2014-11-03
Publication date: 2021-05-18
Anticipated expiration: 2034-11-03
Also published as: WO2016070563A1; CN105554783A

Abstract

The invention discloses an air interface test device, an air interface test system and an air interface test method, wherein the device comprises a power distribution unit and a phase shift unit connected with the power distribution unit; the power division unit comprises N first ports and M second ports; said M is greater than said N; both M and N are integers greater than 2; the phase shift unit comprises M third ports and N fourth ports; one of the second ports is connected with one of the third ports to form M phase-shifting branches; the phase shifting unit is used for performing phase shift on the signal input into the power dividing unit or the signal output by the power dividing unit according to the mapping relation between an orthogonal matrix and the phase shift degree; wherein the orthogonal matrix comprises M elements, and one element corresponds to one phase-shifting branch; the value of the element has a mapping relationship with the degree of phase shift.

Description

Air interface test device, system and air interface test method

Technical Field

The present invention relates to an air interface test technology in the field of wireless communication, and in particular, to an air interface test apparatus, system, and method.

Background

With the development of multi-antenna technology, beamforming technology is increasingly used in wireless communication, and the wireless communication is evolving in a high-speed multi-stream direction. However, how to verify and test the multi-stream beamforming air interface in a simpler manner and at a lower cost becomes a serious challenge, and the conventional multi-stream beamforming air interface detection method generally includes two methods:

the first method comprises the following steps: in the drive test mode, the terminals are required to be distributed in a plurality of different directions for carrying out the pull distance test. The method can reflect the real situation of the practical application of the multi-stream beam forming technology, but has the disadvantages of huge engineering, time and labor waste, incapability of frequent adoption and inconvenience for troubleshooting and positioning.

And the second method comprises the following steps: however, the channel simulator supporting the multi-antenna beamforming test needs uplink and downlink balancing and needs a large number of channels. Therefore, the equipment cost is not generally high, and the calibration is also required to be higher. It is therefore difficult to apply in large quantities, which is disadvantageous for finding problems with large samples.

Disclosure of Invention

In view of this, embodiments of the present invention are expected to provide an air interface testing apparatus, an air interface testing system, and an air interface testing method, so as to reduce hardware cost and simplify testing operations.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a first aspect of the embodiments of the present invention provides an air interface testing apparatus, where the apparatus includes a power dividing unit and a phase shifting unit connected to the power dividing unit;

the power division unit comprises N first ports and M second ports; said M is greater than said N; both M and N are integers greater than 2;

the phase shift unit comprises M third ports and N fourth ports;

one of the second ports is connected with one of the third ports to form M phase-shifting branches;

the phase shifting unit is used for performing phase shift on the signal input into the power dividing unit or the signal output by the power dividing unit according to the mapping relation between an orthogonal matrix and the phase shift degree;

wherein the orthogonal matrix comprises M elements, and one element corresponds to one phase-shifting branch; the value of the element has a mapping relationship with the degree of phase shift.

Preferably, the first and second electrodes are formed of a metal,

each of the first ports is connected to each of the fourth ports through the phase shift branch.

Preferably, the first and second electrodes are formed of a metal,

the power division unit comprises at least two power dividers;

each power divider is used for dividing one path of input signals into at least two paths of output signals with equal phase or combining at least two paths of input signals with equal phase into one path of output signals.

Preferably, the first and second electrodes are formed of a metal,

the phase shift unit comprises at least two hybrid couplers;

each hybrid coupler is used for dividing one path of input signals into at least two paths of output signals with a certain phase relation or combining at least two paths of input signals into one path of output signals according to a certain phase relation according to the mapping relation between the orthogonal matrix and the phase deviation degree.

Preferably, the first and second electrodes are formed of a metal,

the phase shift unit includes:

the power divider is used for dividing one path of input signals into at least two paths of output signals with equal phase or combining the at least two paths of input signals with equal phase into one path of output signals;

and the phase shifting module is used for performing phase shift on the signal according to the mapping relation between the orthogonal matrix and the phase shift degree.

Preferably, the first and second electrodes are formed of a metal,

the phase shifting module comprises a phase shifter and/or a phase shifting cable.

A second aspect of the embodiments of the present invention provides an air interface test system, where the system includes the above-described air interface test apparatus; the air interface testing device comprises N first ports and N fourth ports;

one of the first ports is connected with a terminal, and one of the fourth ports is connected with an antenna port of the test base station; or one fourth port is connected with a terminal, and one first port is connected with an antenna port of the test base station.

An air interface test method in an embodiment of the present invention includes:

receiving an uplink signal sent by a terminal;

dividing each of the uplink signals into N uplink components;

performing phase offset processing on each uplink component;

sending the uplink component subjected to the phase offset processing to a test base station;

receiving N downlink signals sent by a test base station through beamforming according to the phase relation of the uplink component;

dividing the N downlink signals into M downlink components and performing phase offset processing on the M downlink components;

performing signal synthesis processing on the M downlink components and then sending the M downlink components to a terminal;

when the phase offset is carried out, carrying out the phase offset on the uplink signal component or the downlink signal component according to the mapping relation between an orthogonal matrix and a phase offset degree;

the orthogonal matrix comprises M elements, and one element corresponds to one path of the uplink signal component or one path of the downlink signal component; the value of the element has a mapping relationship with the degree of phase shift.

Preferably, the first and second electrodes are formed of a metal,

the method is applied to an empty port testing device comprising N first ports and N fourth ports; m phase-shifting branches are formed between the N first ports and the N fourth ports; one of the phase shift branches is used for phase shift of one of the uplink signal components or one of the downlink signal components;

when the air interface test device receives the uplink signal from the first port, the uplink signal component is sent to the test base station through the fourth port; and when the air interface test device receives an uplink signal from the fourth port, sending the uplink signal component to the test base station through the first port.

A fourth aspect of the present invention provides an air interface testing method, where the method includes:

the test terminal sends an uplink signal;

the air interface test device receives the uplink signals, divides each uplink signal into N uplink signal components, and performs phase offset processing on each uplink signal component according to the mapping relation between the orthogonal matrix and the phase offset degree;

the air interface test device sends the uplink signal component subjected to the phase offset processing to N antenna ports of a test base station;

a test base station receives an uplink signal sent by a terminal;

the test base station determines the assigned value of the downlink signal according to the phase of the uplink signal;

the test base station generates and sends a downlink signal according to the shape-giving value;

the air interface test device divides each downlink signal into N downlink signal components and carries out phase offset processing on each downlink signal component according to the mapping relation between the orthogonal matrix and the phase offset degree;

the air interface testing device synthesizes the downlink signal components and sends the synthesized downlink signal components to a terminal;

each terminal receives the downlink signal;

wherein the orthogonal matrix comprises M elements, one of the elements corresponding to one of the uplink signal components or one of the downlink signal components; the value of the element has a mapping relation with the phase offset degree;

and the downlink signal received by the terminal is used for determining the effect of orthogonal beam forming of the test base station.

Preferably, the first and second electrodes are formed of a metal,

and when the strength of the downlink signals received by one terminal and sent to other terminals is greater than a preset threshold value, the orthogonal beam forming of the test base station is abnormal.

The invention provides an air interface testing device consisting of a power division unit and a phase shifting unit, and the device can provide a plurality of phase shifting branches, and the phase shift degree of each phase shifting branch has a mapping relation with an orthogonal matrix. The device can provide non-interfering transmission channels when used for air interface detection; compared with the existing channel simulator, the air interface test device for the air interface test can greatly reduce the hardware cost, and has the advantage of simple and convenient test compared with a drive test method.

Drawings

Fig. 1 is a schematic structural diagram of an air interface testing apparatus according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an air interface testing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an air interface test system according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of an air interface testing method according to an embodiment of the present invention;

fig. 5 is a second schematic flow chart of an air interface testing method according to an embodiment of the present invention;

fig. 6 is a second schematic structural diagram of an air interface test system according to an example of the present invention;

fig. 7 is a schematic structural diagram of an air interface testing apparatus according to an example of the present invention;

fig. 8 is a second schematic structural diagram of an air interface testing apparatus according to an example of the present invention;

fig. 9 is a third schematic structural diagram of an air interface testing apparatus according to an example of the present invention;

fig. 10 is a fourth schematic structural diagram of an air interface testing apparatus according to an example of the present invention;

fig. 11 is a fifth schematic structural diagram of an air interface testing apparatus according to an example of the present invention;

fig. 12 is a fifth schematic structural diagram of an air interface testing apparatus according to an example of the present invention.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.

The first embodiment is as follows:

as shown in fig. 1, this embodiment provides an air interface testing apparatus, where the apparatus includes a power dividing unit 110 and a phase shifting unit 120 connected to the power dividing unit 110;

the power dividing unit 110 includes N first ports 111 and M second ports 112; said M is greater than said N; both M and N are integers greater than 2;

the phase shift unit 120 includes M third ports 113 and N fourth ports 114;

one of the second ports 112 is connected to one of the third ports 113 to form M phase shift branches;

the phase shift unit 120 is configured to perform phase shift on the signal input to the power division unit or the signal output by the power division unit according to a mapping relationship between an orthogonal matrix and a phase shift degree;

Specifically, the orthogonal matrix is a real-number-specialized unitary matrix, and in this embodiment, the orthogonal matrix may be an orthogonal matrix composed of 1, -1, i and-i.

The air interface test apparatus shown in fig. 2 includes 4 phase-shifting branches, and the corresponding orthogonal matrix is

If the first phase-shifting branch of the air interface testing device corresponds to the element of the 1 st row and the 1 st column in the orthogonal matrix; a second phase-shifting branch of the air interface testing device corresponds to an element of a 2 nd row and a 1 st column in the orthogonal matrix; a third phase-shifting branch of the air interface testing device corresponds to an element of a 1 st row and a 2 nd column in the orthogonal matrix; a fourth phase-shifting branch of the air interface testing apparatus corresponds to an element in a 2 nd row and a 2 nd column in the orthogonal matrix. If the corresponding phase deviation degree of 1 is 0 degree; the phase shift degree corresponding to-1 is 180 °, the phase shift degree of the first phase shift branch is 0 °, the phase shift degree of the second phase shift branch is 0 °, the phase shift degree of the third phase shift branch is 180 °, and the phase shift degree of the fourth phase shift branch is 0 °. When said 1 represents 0 °, said-1 represents 180 °, then said i may represent 90 °, said-i represents-90 °, i.e. 270 °.

In a specific implementation process, the correspondence between each element of the orthogonal matrix and the phase shift degree may also send a change, such as 1 representing 180 °, and-1 representing 0 °. When, for example, 1 represents 45 °, said-1 represents 135 °, then said i may represent-135 °, said-i represents-45 °.

In a specific implementation, the first phase-shifting branch may also correspond to an element in a 1 st row and a 1 st column in the orthogonal matrix, and the second phase-shifting branch may also correspond to an element in a 1 st row and a 2 nd column in the orthogonal matrix; the third phase shift branch may also correspond to an element in a 2 nd row and a 1 st column in the orthogonal matrix, and the fourth phase shift branch may also correspond to an element in a 2 nd row and a 2 nd column in the orthogonal matrix; the orthogonal matrix may be

The corresponding relationship between each phase shift branch and each element in the orthogonal matrix can be predetermined in advance. If the elements of the orthogonal matrix can be counted by rows, the 1 st row and the 1 st column are the 1 st element, the serial number of the 2 nd element of the 1 st row and the 2 nd column is the 2 nd element, and the xth row and the yth element are the (x-1) × Y + Y elements; y is the number of elements in each row; the z-th phase shift branch corresponds to the z-th element. For another example, if the elements of the orthogonal matrix can be counted by columns, the 1 st row and the 1 st column are the 1 st element, the 2 nd element of the serial number of the 1 st element in the 2 nd row and the 1 st column is the (y-1) × X + X elements in the xth row; x is the number of elements in each column; the z-th phase shift branch corresponds to the z-th element.

Preferably, each of the first ports is connected to each of the fourth ports through N of the phase shift branches. With the air interface testing apparatus of this embodiment, a signal sent from a first port passes through the phase-shifting branch, and is divided into N signal components, which enter fourth ports, respectively, where each of the fourth ports can receive one signal component; after passing through the phase shift branch, a signal sent from a fourth port is divided into N signal components, which enter the first ports, respectively, wherein each of the first ports receives one of the signal components.

Preferably, the power dividing unit 110 includes at least two power dividers;

each power divider is used for dividing one path of input signals into at least two paths of output signals with equal phase or synthesizing at least two paths of input signals with equal phase into one path of output signals.

Dividing one input signal into at least two equal-phase output signals, specifically, dividing one input signal into at least two signals with the same phase; the two signals are not phase shifted. At least two paths of input signals are synthesized into one path of output signals, if the initial phase of one path of input signals is 90 degrees and the initial phase of the other path of input signals is 0 degree, the power divider carries out signal synthesis on the premise of not carrying out phase deviation on any path of input signals. In summary, the power divider described herein is a device that divides a signal into a plurality of signals or synthesizes a plurality of signals into one signal, but does not perform a phase shift process on the signal.

The phase shift unit 120 may include at least two Hybrid couplers (Hybrid couplers); the hybrid coupler is also called a hybrid bridge circuit.

Unlike the power divider, the hybrid coupler also has the function of dividing a signal into multiple signals or combining multiple signals into one signal, and the coupler also performs phase shift on the signal in each phase shift branch according to the mapping relationship between the orthogonal matrix and the phase shift angle.

In a specific implementation, the phase shift unit may further include a power divider and a phase shift module; the phase shifting module can be at least one of a phase shifter and a phase shifting cable.

The power divider is used for dividing one path of input signals into at least two paths of output signals with equal phase or combining the at least two paths of input signals with equal phase into one path of output signals; the phase shift module is used for performing phase shift on the signal according to the mapping relation between the orthogonal matrix and the phase shift degree.

In addition, the phase shifter can also be replaced by a phase shifting cable to form the phase shifting unit together with the power divider.

This embodiment provides a simple and easy empty port testing arrangement, and the device will come for current expensive channel simulator, can constitute by the electronic components that the cost is low and simple structure's electronic equipment constitutes through power division unit and phase shift unit etc. has with low costs advantage, and need not carry out loaded down with trivial details drive test.

Example two:

as shown in fig. 3, this embodiment provides an air interface test system, where the system includes the air interface test apparatus 100 according to any technical solution in the previous embodiment; the air interface testing device comprises N first ports and N fourth ports;

one of the first ports is connected to a terminal, and one of the fourth ports is connected to an antenna port of the test base station 200;

or

One of the fourth ports is connected to a terminal, and one of the first ports is connected to an antenna port of the test base station 200.

Wherein the test base station comprises at least N antenna ports.

In fig. 3, the air interface testing apparatus 100 includes 2 first ports and 2 fourth ports; 4 phase shift branches are formed between the first port and the fourth port, and are respectively a first phase shift branch, a second phase shift branch, a third phase shift branch and a fourth phase shift branch. In the system shown in fig. 3, 2 terminals 3101, 3201 and 1 test base station 200 with at least two antenna ports are connected.

During a specific test, the terminal sends an uplink signal to a test base station through the air interface test device 100; the uplink signal is processed by the power dividing unit 110 to become M signals; the M types are processed by the phase shift branch circuit and then form N signals subjected to phase shift and transmit the N signals to the test base station 200; the test base station 200 determines a shaping value according to the phase relation of the received uplink signal, and sends a downlink signal to the terminal according to the shaping value; the downlink signal is processed by the air interface test device 100 and then sent to the terminal; when M signal components into which a downlink signal is divided are processed by the power dividing unit 110, the M signal components are added in phase and offset in reverse, and if a beamforming value is correct (i.e., a beamforming effect of a test base station is good), a terminal will only receive a signal corresponding to the downlink signal and will not receive a signal originally sent by the test base station to another terminal, otherwise, beamforming abnormality may occur.

Further, the system also includes N first attenuators;

the air interface test device is connected with the test base station through the first attenuator.

The first attenuator is used for carrying out uplink attenuation on each signal transmitted to the test base station in an uplink mode, and signal attenuation in a real wireless environment is simulated. The attenuator may be an adjustable attenuator.

Still further, the system further comprises N second attenuators;

and the air interface testing device is connected with the terminal through the second attenuator. The second attenuator may be an adjustable attenuator.

Example three:

as shown in fig. 4, this embodiment provides a method for testing an air interface, where the method includes:

step S110: receiving an uplink signal sent by a terminal;

step S120: dividing each of the uplink signals into N uplink components;

step S130: performing phase offset processing on each uplink component;

step S140: sending the uplink component subjected to the phase offset processing to a test base station;

step S150: receiving N downlink signals sent by a test base station through beamforming according to the phase relation of the uplink component;

step S160: dividing the N downlink signals into M downlink components and performing phase offset processing on the M downlink components;

step S170: performing signal synthesis processing on the M downlink components and then sending the M downlink components to a terminal;

The method is applied to an air interface testing apparatus (specifically, the air interface testing apparatus according to any technical scheme in the first embodiment) including N first ports and N fourth ports; m phase-shifting branches are formed between the N first ports and the N fourth ports; one of the phase shift branches is used for phase shift of one of the uplink signal components or one of the downlink signal components;

The method described in this embodiment is based on the air interface test apparatus described in the first embodiment, and performs a signal processing operation during air interface detection.

Specifically, for example, the terminal 3101 and the terminal 3201 respectively send uplink signals to the air interface testing apparatus 100 through the first port; the air interface testing device 100 receives the uplink signals, divides each uplink signal into 2 uplink signal components, performs phase shift processing on the uplink signal components through different phase shift branches, and sends the uplink signal components to each antenna port of the testing base station, and the testing base station determines a beam forming value according to the phase relationship of the components of the 2 uplink signals received by each antenna port and sends downlink signals to the terminal through the air interface testing device 100. One of the antenna ports will transmit a downlink signal, and usually this downlink signal component is a composite signal, and there is a signal component in the composite signal to be transmitted to the terminal 3101 and a signal component to be transmitted to the terminal 3201; after receiving the downlink signals, the air interface test apparatus 100 divides each signal into 2 downlink signal components, which form 4 downlink signal components, where one downlink signal component is transmitted by one phase shift branch, and after the phase shift processing by the phase shift unit, the same-phase addition and the opposite-phase cancellation in signal synthesis are performed, and finally the signals are sent to the terminal 3101 and the terminal 3201.

On the premise that the phase of the uplink signal received by the test base station is correct, if the beamforming of the test base station is normal, in an ideal state, the terminal 3101 can only receive the signal sent by the base station to the terminal 3101, and the terminal 3201 can only receive the signal sent by the base station to the terminal 3201, otherwise, the beamforming is abnormal. In the specific implementation process, due to some error factors of signal processing, if the terminal 3101 receives a signal sent by the base station to the terminal 3201, if the signal strength is lower than a certain threshold, it may be considered that the beamforming of the test base station is normal.

In this embodiment, the empty port testing apparatus described in the first embodiment is used to perform empty port detection, which has the advantage of being simple and convenient to implement compared with the existing drive test method, and has the advantage of low hardware cost compared with the existing measurement method using a common channel simulator.

For the phase offset angle relationship of the phase offset performed by the air interface device in this embodiment, reference may be made to the detailed description in the first embodiment.

Example four:

as shown in fig. 5, this embodiment provides a method for testing an air interface, where the method includes:

step S210: the test terminal sends an uplink signal;

step S220: the air interface test device receives the uplink signals, divides each uplink signal into N uplink signal components, and performs phase offset processing on each uplink signal component according to the mapping relation between the orthogonal matrix and the phase offset degree;

step S230: the air interface test device sends the uplink signal component subjected to the phase offset processing to N antenna ports of a test base station;

step S240: a test base station receives an uplink signal sent by a terminal;

step S250: the test base station determines the assigned value of the downlink signal according to the phase of the uplink signal;

step S260: the test base station generates and sends a downlink signal according to the shape-giving value;

step S270: the air interface test device divides each downlink signal into N downlink signal components, and performs phase offset processing on each downlink signal component according to the mapping relation between the orthogonal matrix and the phase offset degree;

step S280: the air interface testing device synthesizes the downlink signal components and sends the synthesized downlink signal components to a terminal;

step S290: each terminal receives the downlink signal;

and the downlink signals received by each terminal are used for determining the effect of orthogonal beam forming of the test base station.

In a specific implementation, if the test base station sends P downlink signals through P antenna ports, the air interface test device forms P × N downlink signal components, and synthesizes the P × N downlink signal components into P signals to send to the terminal when sending downlink signals to the terminal.

And when the strength of the downlink signals received by one terminal and sent to other terminals is greater than a preset threshold value, the orthogonality of the beam forming of the test base station is abnormal.

For example, when the m + n terminal receives the mth downlink signal sent to the mth terminal and the strength of the mth downlink signal is greater than the preset threshold, the beamforming of the test base station is abnormal;

for example, the m + n is an integer greater than 1 and not greater than the total number of terminals that the air interface test apparatus can connect to; and m and n are integers less than 1.

Here, the orthogonal beamforming effect of the test base station is determined according to the strength of each downlink signal received by the terminal.

When one terminal regards the received signals sent by the test base station to other terminals as noise, the method can also comprise the step of determining the signal-to-noise ratio of the downlink signals received by each terminal; the signal-to-noise ratio of the downlink signal is used for determining the effect of orthogonal beam forming of the test base station; generally, the higher the signal-to-noise ratio is, the better the orthogonal beamforming effect of the test base station is.

When a test base station sends a downlink signal to a terminal from an antenna interface for the first time; transmitting downlink signals to the terminal by the plurality of antenna ports for the second time respectively; the gain of the downlink signal can be determined by comparing the strength of the downlink signal received by the terminal for the two times; and determining the effect of orthogonal wave beam forming of the test base station according to the gain. If the gain is smaller than the preset value, the effect of orthogonal beam forming of the test base station may be poor.

The method described in this embodiment is based on the empty port testing apparatus described in the first embodiment to perform empty port detection, and has the advantage of being simple and convenient to implement compared with the existing drive test method, and has the advantage of low hardware cost compared with the existing measurement method using a common channel simulator.

In a specific implementation process, the uplink signal may be processed by an attenuator and then sent to an air interface testing device, and then processed by the air interface testing device and then sent to an attenuator, and then the attenuator is subjected to attenuation processing and sent to a testing base station. The downlink signal can also be sent to the air interface testing device after being processed by the attenuator, then sent to the attenuator after being processed by the air interface testing device, and sent to the terminal after being attenuated by the attenuator.

The air interface test system shown in fig. 6 includes a base station, a terminal 1, a terminal 2, a terminal 3, a terminal 4, and an air interface test apparatus surrounded by a dashed box. In addition, the system also comprises an adjustable attenuator 1, an attenuator 2, an attenuator 3 and an attenuator 4 which are connected with the terminal, and an attenuator a, an attenuator b, an attenuator c and an attenuator d which are connected with the base station. An application block diagram of the simple and convenient device for the air interface test suitable for the multi-stream beamforming is shown in the attached drawing 1.

The structure in the virtual frame is that the ports a, b, c and d of the air interface test device are respectively connected with the antenna ports of the multi-antenna base station (through attenuators).

Ports

1, 2, 3 and 4 of the air interface test device are respectively connected with terminals (through adjustable attenuators). The base station determines the shaped value of each antenna downlink signal according to the phase relation of the uplink signal of each antenna port according to the principle of beam forming, and each shaped downlink signal forms a data stream signal corresponding to the terminal at each terminal antenna port because the respective phase relation is in-phase addition or reverse offset respectively after passing through the device.

Although the ports a, b, c and d of the air interface test device are connected to the antenna port of the base station and the

ports

1, 2, 3 and 4 are connected to the terminal, respectively, in practice, the

ports

1, 2, 3 and 4 of the air interface test device are connected to the antenna port of the base station and the ports a, b, c and d are connected to the terminal.

Several specific examples are provided below in connection with any of the embodiments described above:

example 1:

referring to fig. 7, the structure of the air interface detection apparatus provided in this example is as follows:

the 90-degree branch of the 90-degree coupler (201) is connected with the 90-degree coupler (205), and the 0-degree branch of the 90-degree coupler (201) is connected with the 90-degree coupler (206). The 90-degree branch of the 90-degree coupler (205) is connected with the power divider (213), the 0-degree branch of the 90-degree coupler (205) and the 90-degree branch of the 90-degree coupler (206) are respectively connected with the power divider (214) and the power divider (216), and the 0-degree branch of the 90-degree coupler (206) is connected with the power divider (215).

The 90-degree branch of the 90-degree coupler (202) is connected with the 90-degree coupler (207), and the 0-degree branch of the 90-degree coupler (202) is connected with the 90-degree coupler (208). The 90-degree branch of the 90-degree coupler (207) is connected with the power divider (214), the 0-degree branch of the 90-degree coupler (207) and the 90-degree branch of the 90-degree coupler (208) are respectively connected with the power divider (213) and the power divider (215), and the 0-degree branch of the 90-degree coupler (208) is connected with the power divider (216).

The 90-degree branch of the 90-degree coupler (203) is connected with the 90-degree coupler (209), and the 0-degree branch of the 90-degree coupler (203) is connected with the 90-degree coupler (210). The 90-degree branch of the 90-degree coupler (209) is connected with the power divider (215), the 0-degree branch of the 90-degree coupler (209) and the 90-degree branch of the 90-degree coupler (210) are respectively connected with the power divider (214) and the power divider (216), and the 0-degree branch of the 90-degree coupler (210) is connected with the power divider (213).

The 90-degree branch of the 90-degree coupler (204) is connected with the 90-degree coupler (211), and the 0-degree branch of the 90-degree coupler (204) is connected with the 90-degree coupler (212). The 90-degree branch of the 90-degree coupler (211) is connected with the power divider (216), the 0-degree branch of the 90-degree coupler (211) and the 90-degree branch of the 90-degree coupler (212) are respectively connected with the power divider (213) and the power divider (215), and the 0-degree branch of the 90-degree coupler (212) is connected with the power divider (214).

The ports of the devices a, b, c and d shown in fig. 7 are the fourth ports described in the above embodiment, and are used for connecting with the antenna port of the base station, and the

ports

1, 2, 3 and 4 in this example are the first ports in the above embodiment, and are respectively connected with the terminal 1, the terminal 2, the terminal 3 and the terminal 4.

Note that the phases of the terminal 1 arriving at the ports of the antennas a, b, c and d of the base station are M1a, M1b, M1c and M1d in sequence, then the phase relationship between the phases is: m1a pi/2 + pi/2M 1b pi/2M 1c 0+0 pi/2M 1d pi/0 + pi/2.

Similarly, the phase relationship between the terminal 2 and the ports a, b, c and d of each antenna of the base station can be obtained as follows: m2a ═ pi/2, M2b ═ pi, M2c ═ pi/2, and M2d ═ 0.

The phase relationship from the terminal 3 to the ports a, b, c and d of each antenna of the base station is as follows: m3a ═ 0, M3b ═ pi/2, M3c ═ pi, M3d ═ pi/2.

The phase relationship from the terminal 4 to the ports a, b, c and d of each antenna of the base station is as follows: m4a ═ pi/2, M4b ═ 0, M4c ═ pi/2, and M4d ═ pi.

Assuming that downlink signals sent by the base station to the

terminals

1, 2, 3, and 4 are T1, T2, T3, and T4, respectively, according to the working principle of multi-stream beamforming, a shaped composite downlink signal actually sent by the base station antenna a is: ant 1 × exp (-M1a × i) + T2 × exp (-M2a × i) + T3 × exp (-M3a × i) + T4 × exp (-M4a × i) — T1-iT2+ T3-iT 4.

The shaped composite downlink signal actually sent by the base station antenna b is: ANTb ═ T1 × exp (-M1b × i) + T2 × exp (-M2b × i) + T3 × exp (-M3b × i) + T4 × exp (-M4b × i) ═ iT1-T2-iT3+ T4.

The shaped composite downlink signal actually sent by the base station antenna c is: ANTc ═ T1-iT2-T3-iT 4.

The shaped composite downlink signal actually sent by the base station antenna d is: ant-iT 1+ T2-iT 3-T4.

Downlink signals of each antenna of the base station reaching the terminal 1 after passing through the air interface test device in this example are: ANTa × exp (pi/2 + pi/2) + ANTb × exp (pi/2 +0) + ANTc × exp (0+0) + ANTd × exp (pi/2 +0) ═ 4T1

The signals arriving at terminal 2 are:

ANTa*exp(π/2+0)+ANTb*exp(π/2+π/2)+ANTc*exp(π/2+0)+ANTd*exp(0+0)＝4T2。

the signals arriving at terminal 3 are:

ANTa*exp(0+0)+ANTb*exp(0+π/2)+ANTc*exp(π/2+π/2)+ANTd*exp(0+π/2)＝4T3

the signal arriving at terminal 4 is

ANTa*exp(0+π/2)+ANTb*exp(0+0)+ANTc*exp(0+π/2)+ANTd*exp(π/2+π/2)＝4T4。

Thus, by the testing device of the invention, if the base station detects the phase of the uplink signal of each terminal correctly and the shaped value of the downlink signal of each terminal correctly, independent undisturbed downlink signals can be obtained at each terminal port.

This example is a subset of example 7.

Example 2:

referring to fig. 8, the structure of the air interface testing apparatus according to this example is as follows:

2 branches of the power divider (301) are respectively connected with a 180-degree coupler (305) and an in-phase coupler (306). The 180-degree branch of the 180-degree coupler (305) is connected with the power divider (316), the 0-degree branch of the 180-degree coupler (305) and the two branches of the in-phase coupler (306) are respectively connected with the power divider (313), the power divider (314) and the power divider (315).

2 branches of the power divider (302) are respectively connected with a 180-degree coupler (307) and an in-phase coupler (308). The 180-degree branch of the 180-degree coupler (307) is connected with the power divider (315), the 0-degree branch of the 180-degree coupler (307) and the two branches of the in-phase coupler (308) are respectively connected with the power divider (313), the power divider (314) and the power divider (316).

2 branches of the power divider (303) are respectively connected with a 180-degree coupler (309) and an in-phase coupler (310). The 180-degree branch of the 180-degree coupler (309) is connected with the power divider (314), the 0-degree branch of the 180-degree coupler (309) and the two branches of the in-phase coupler (310) are respectively connected with the power divider (313), the power divider (315) and the power divider (316).

2 branches of the power divider (304) are respectively connected with a 180-degree coupler (311) and an in-phase coupler (312). The 180-degree branch of the 180-degree coupler (311) is connected with the power divider (313), the 0-degree branch of the 180-degree coupler (311) and the two branches of the in-phase coupler (312) are respectively connected with the power divider (314), the power divider (315) and the power divider (316).

This example may be a subset of example 5.

Example 3:

referring to fig. 9, the structure of the air interface testing apparatus according to this example is as follows:

the 90-degree branch of the 90-degree coupler (401) is connected with the in-phase coupler (405), and the 0-degree branch of the 90-degree coupler (401) is connected with the 180-degree coupler (406). 2 branches of the in-phase coupler (405) are respectively connected with the power divider (414) and the power divider (416). The 180-degree branch of the 180-degree coupler (406) is connected with the power divider (413), and the 0-degree branch of the 180-degree coupler (406) is connected with the power divider (415).

The 90-degree branch of the 90-degree coupler (402) is connected with the in-phase coupler (407), and the 0-degree branch of the 90-degree coupler (402) is connected with the 180-degree coupler (408). 2 branches of the in-phase coupler (407) are respectively connected with the power divider (413) and the power divider (415). The 180-degree branch of the 180-degree coupler (408) is connected with the power divider (414), and the 0-degree branch of the 180-degree coupler (408) is connected with the power divider (416).

The 90-degree branch of the 90-degree coupler (403) is connected with the in-phase coupler (409), and the 0-degree branch of the 90-degree coupler (403) is connected with the 180-degree coupler (410). 2 branches of the in-phase coupler (409) are respectively connected with the power divider (414) and the power divider (416). The 180-degree branch of the 180-degree coupler (410) is connected with the power divider (415), and the 0-degree branch of the 180-degree coupler (410) is connected with the power divider (413).

The 90-degree branch of the 90-degree coupler (404) is connected with the in-phase coupler (411), and the 0-degree branch of the 90-degree coupler (404) is connected with the 180-degree coupler (412). 2 branches of the in-phase coupler (411) are respectively connected with the power divider (413) and the power divider (415). The 180-degree branch of the 180-degree coupler (412) is connected with the power divider (416), and the 0-degree branch of the 180-degree coupler (412) is connected with the power divider (414).

Example 4:

referring to fig. 10, the structure of the air interface test apparatus of this example is as follows:

2 branches of the in-phase coupler (501) are respectively connected with the power divider (503) and the power divider (504).

The 180-degree branch of the 180-degree coupler (502) is connected with the power divider (504), and the 0-degree branch of the 180-degree coupler (502) is connected with the power divider (503).

This example can be considered as the basis for examples 2 and 5, examples 2 and 5 being considered as variations of this example.

Example 5:

referring to fig. 11, the structure of the air interface testing apparatus according to this example is as follows:

the 4 branches of the power divider (601) are respectively connected with in-phase couplers (609) and (610) and 180-degree couplers (611) and (612). Each branch of the in-phase couplers (609) and (610) and the 0-degree branch of the 180-degree couplers (611) and (612) are respectively connected with the power dividers (641), (642), (643), (645), (646) and (647). The 180 degree branches of the 180 degree couplers (611) and (612) are respectively connected with the power dividers (644) and (648).

The 4 branches of the power divider (602) are respectively connected with in-phase couplers (613), (614) and 180-degree couplers (615), (616). Each branch of the in-phase couplers (613), (614) and the 0-degree branch of the 180-degree couplers (615), (616) are respectively connected with power dividers (641), (642), (644), (645), (646), (648). The 180 degree branches of the 180 degree couplers (615), (616) are respectively connected with the power dividers (643), (647).

The 4 branches of the power divider (603) are respectively connected with an in-phase coupler (617), (618) and a 180-degree coupler (619), (620). Each branch of the in-phase couplers (617) and (618) and the 0-degree branch of the 180-degree couplers (619) and (620) are respectively connected with the power dividers (641), (643), (644), (645), (647) and (648). 180 degree branches of the 180

degree couplers

619 and 620 are respectively connected with the power divider 642 and 646.

The 4 branches of the power divider (604) are respectively connected with in-phase couplers (621), (622) and 180-degree couplers (623), (624). Each branch of the in-phase couplers (621) and (622) and the 0-degree branch of the 180-degree couplers (623) and (624) are respectively connected with the power dividers (642), (643), (644), (646), (647) and (648). The 180 degree branches of the 180 degree couplers (623) and (624) are respectively connected with the power dividers (641) and (645).

The 4 branches of the power divider (605) are respectively connected with 180-degree couplers (625), (626), (627) and (628). The 0 degree branches of the 180

degree couplers

625, 626, 627 and 628 are respectively connected to the

power dividers

641, 642, 643 and 648. The 180 degree branches of the 180

degree couplers

625, 626, 627 and 628 are respectively connected with the

power dividers

644, 645, 646 and 647.

The 4 branches of the power divider (606) are respectively connected with the 180-degree couplers (629), (630), (631) and (632). The 0 degree branches of the 180

degree couplers

629, 630, 631 and 632 are respectively connected with the

power dividers

641, 642, 644 and 647. The 180 degree branches of the 180 degree couplers (629), (630), (631) and (632) are respectively connected with the power dividers (643), (645), (646) and (648).

The 4 branches of the power divider (607) are respectively connected with 180-degree couplers (633), (634), (635) and (636). The 0 degree branches of the 180 degree couplers (633), (634), (635) and (636) are respectively connected with the power dividers (641), (643), (644) and (646). The 180-degree branches of the 180-degree couplers (633), (634), (635) and (636) are respectively connected with the power dividers (642), (645), (647) and (648).

The 4 branches of the power divider (608) are respectively connected with 180-degree couplers (637), (638), (639) and (640). The 0 degree branches of the 180 degree couplers (637), (638), (639) and (640) are respectively connected with the power dividers (642), (643), (644) and (645). The 180 degree branches of the 180

degree couplers

637, 638, 639 and 640 are respectively connected to the

power dividers

641, 646, 647 and 648.

Assume that ports a, b, c, d, e, f, g, and h of the air interface testing apparatus of this example in fig. 11 are respectively connected to antenna ports of a base station, and

ports

1, 2, 3, 4, 5, 6, 7, and 8 of the air interface testing apparatus of this example are respectively connected to terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, and terminal 8.

Note that the phases of the terminals 1 arriving at the ports a, b, c, d, e, f, g, and h of the base station antennas are M1a, M1b, M1c, M1d, M1e, M1f, M1g, and M1h in sequence, so that it is not difficult to obtain the phase relationship between them: m1a ═ 0, M1b ═ 0, M1c ═ 0, M1d ═ pi, M1e ═ 0, M1f ═ 0, M1g ═ 0, and M1h ═ pi.

Similarly, the phase relationship between the terminal 2 and the ports a, b, c, d, e, f, g, and h of the base station antennas is sequentially obtained as follows: m2a ═ 0, M2b ═ 0, M2c ═ pi, M2d ═ 0, M2e ═ 0, M2f ═ 0, M2g ═ pi, M2h ═ 0.

The phase relationship from the terminal 3 to the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m3a ═ 0, M3b ═ pi, M3c ═ 0, M3d ═ 0, M3e ═ 0, M3f ═ pi, M3g ═ 0, and M3h ═ 0.

The phase relationship between the terminal 4 and the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m4a ═ pi, M4b ═ 0, M4c ═ 0, M4d ═ 0, M4e ═ pi, M4f ═ 0, M4g ═ 0, and M4h ═ 0.

The phase relationship between the terminal 5 and the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m5a ═ 0, M5b ═ 0, M5c ═ 0, M5d ═ pi, M5e ═ pi, M5f ═ pi, M5g ═ pi, M5h ═ 0.

The phase relationship between the terminal 6 and the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m6a ═ 0, M6b ═ 0, M6c ═ pi, M6d ═ 0, M6e ═ pi, M6f ═ pi, M6g ═ 0, and M6h ═ pi.

The phase relationship from the terminal 7 to the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m7a ═ 0, M7b ═ pi, M7c ═ 0, M7d ═ 0, M7e ═ pi, M7f ═ 0, M7g ═ pi, M7h ═ pi.

The phase relationship between the terminal 8 and the ports a, b, c, d, e, f, g, h of the antennas of the base station is as follows: m8a ═ pi, M8b ═ 0, M8c ═ 0, M8d ═ 0, M8e ═ 0, M8f ═ pi, M8g ═ pi, M8h ═ pi.

Assuming that downlink signals sent by the base station to the terminal 1, the terminal 2, the terminal 3, the terminal 4, the terminal 5, the terminal 6, the terminal 7, and the terminal 8 are T1, T2, T3, T4, T5, T6, T7, and T8, respectively, according to the operating principle of multi-stream beamforming, a shaped composite downlink signal actually sent by the base station antenna a is: ANTa-T1 + T2+ T3-T4+ T5+ T6+ T7-T8.

The shaped composite downlink signal actually sent by the base station antenna b is: ANTb-T1 + T2-T3+ T4+ T5+ T6-T7+ T8.

The shaped composite downlink signal actually sent by the base station antenna c is: ANTc-T1-T2 + T3+ T4+ T5-T6+ T7+ T8.

The shaped composite downlink signal actually sent by the base station antenna d is: ant-T1 + T2+ T3+ T4-T5+ T6+ T7+ T8.

The shaped composite downlink signal actually sent by the base station antenna e is: ant-T1 + T2+ T3-T4-T5-T6-T7+ T8.

The shaped composite downlink signal actually sent by the base station antenna f is: ANTf is T1+ T2-T3+ T4-T5-T6+ T7-T8.

The shaped composite downlink signal actually sent by the base station antenna g is: ANTg-T1-T2 + T3+ T4-T5+ T6-T7-T8.

The shaped composite downlink signal actually sent by the base station antenna h is: ANTh-T1 + T2+ T3+ T4+ T5-T6-T7-T8

Downlink signals of each antenna of the base station reaching the terminal 1 after passing through the air interface test device in this example are: ANTa + ANTb + ANTc-ANTd + ANTe + ANTf + ANTg-ANTh ═ 8T 1.

The signals arriving at terminal 2 are: ANTa + ANTb-ANTc + ANTd + ANTe + ANTf-ANTg + ANTh ═ 8T 2.

The signals arriving at terminal 3 are: ANTa-ANTb + ANTc + ANTd + ANTe-ANTf + ANTg + ANTh ═ 8T 3.

The signals arriving at terminal 4 are: -ANTa + ANTb + ANTc + ANTd-ant + ANTf + ANTg + ANTh ═ 8T 4.

The signals arriving at the terminal 5 are: ANTa + ANTb + ANTc-ANTd-ANTe-ANTf-ANTg + ANTh ═ 8T 5.

The signals arriving at terminal 6 are: ANTa + ANTb-ANTc + ANTd-ANTe-ANTf + ANTg-ANTh ═ 8T 6.

The signals arriving at terminal 7 are: ANTa-ANTb + ANTc + ANTd-ANTe + ANTf-ANTg-ANTh ═ 8T 7.

The signals arriving at terminal 8 are: -ant + ANTb + ANTc + ANTd + ant-ANTf-ANTg-ANTh ═ 8T 8.

Thus, by the testing device of the invention, if the base station detects the phase of the uplink signal of each terminal correctly and the shaped value of the downlink signal of each terminal correctly, independent undisturbed downlink signals can be obtained at each terminal port; if the beamforming value is abnormal, terminal 6 may receive signals received by other terminals, specifically, signals such as T1, T2, or T3.

Example 6:

referring to fig. 12, the structure of the air interface testing apparatus according to this example is as follows:

the 90-degree branch of the 90-degree coupler (701) is connected with the power divider (703), and the 0-degree branch of the 90-degree coupler (701) is connected with the power divider (704).

The 90-degree branch of the 90-degree coupler (702) is connected with the power divider (704), and the 0-degree branch of the 90-degree coupler (702) is connected with the power divider (703).

Example 7:

2 branches of the power divider (801) are respectively connected with a 180-degree coupler (809) and an in-phase coupler (810). The 180-degree branch of the 180-degree coupler (809) is connected with the 90-degree coupler (825). The 0-degree branch of the 180-degree coupler (809) and the 2 branches of the in-phase coupler (810) are respectively connected with the 90-degree couplers (826), (827) and (828). And a 90-degree branch power divider (864) of the 90-degree coupler (825). And a 0-degree branch of the 90-degree coupler (825) is connected with a power divider (857). The 90-degree branches of the 90-degree couplers (826), (827) and (828) are respectively connected with the power dividers (858), (860) and (862). The 0 degree branches of the 90 degree couplers (826), (827) and (828) are respectively connected with power dividers (859), (861) and (863).

2 branches of the power divider (802) are respectively connected with a 180-degree coupler (811) and an in-phase coupler (812). The 180-degree branch of the 180-degree coupler (811) is connected with the 90-degree coupler (829). The 0-degree branch of the 180-degree coupler (811) and the 2 branches of the in-phase coupler (812) are respectively connected with the 90-degree couplers (830), (831) and (832). And a 90-degree branch of the 90-degree coupler (829) is connected with a power divider (863). And a 0-degree branch of the 90-degree coupler (829) is connected with the power divider (858). The 90-degree branches of the 90-degree couplers (830), (831) and (832) are respectively connected with power dividers (857), (859) and (861). The 0 degree branches of the 90 degree couplers (830), (831), (832) are respectively connected with the power dividers (860), (862), (864).

2 branches of the power divider (803) are respectively connected with a 180-degree coupler (813) and an in-phase coupler (814). The 180-degree branch of the 180-degree coupler (813) is connected with the 90-degree coupler (833). The 0-degree branch of the 180-degree coupler (813) and the 2 branches of the in-phase coupler (814) are respectively connected with 90-degree couplers (834), (835) and (836). The 90-degree branch of the 90-degree coupler (833) is connected with a power divider (862). And a 0-degree branch of the 90-degree coupler (833) is connected with a power divider (859). The 90-degree branches of the 90-degree couplers (834), (835) and (836) are respectively connected with the power dividers (858), (860) and (864). The 0 degree branches of the 90 degree couplers (834), (835) and (836) are respectively connected with power dividers (857), (861) and (863).

2 branches of the power divider (804) are respectively connected with the 180-degree coupler (815) and the in-phase coupler (816). The 180 degree branch of the 180 degree coupler (815) is connected with the 90 degree coupler (837). The 0-degree branch of the 180-degree coupler (815) and the 2 branches of the in-phase coupler (816) are respectively connected with the 90-degree couplers (838), (839) and (840). The 90-degree branch of the 90-degree coupler (837) is connected with the power divider (861). And a 0-degree branch of the 90-degree coupler (837) is connected with the power divider (860). The 90-degree branches of the 90-degree couplers (838), (839) and (840) are respectively connected with the power dividers (857), (859) and (863). The 0 degree branches of the 90 degree couplers (838), (839) and (840) are respectively connected with the power dividers (858), (862) and (864).

The 2 branches of the power divider (805) are respectively connected with a 180-degree coupler (817) and an in-phase coupler (818). The 180 degree branch of the 180 degree coupler 817 is connected to the 90 degree coupler 841. The 0-degree branch of the 180-degree coupler (817) and the 2 branches of the in-phase coupler (818) are respectively connected with the 90-degree couplers (842), (843) and (844). And the 90-degree branch of the 90-degree coupler (841) is connected with the power divider (860). The 0-degree branch of the 90-degree coupler (841) is connected with a power divider (861). The 90-degree branches of the 90-degree couplers (842), (843) and (844) are respectively connected with the power dividers (858), (862) and (864). The 0-degree branches of the 90-degree couplers (842), (843) and (844) are respectively connected with power dividers (857), (859) and (863).

2 branches of the power divider (806) are respectively connected with the 180-degree coupler (819) and the in-phase coupler (820). The 180 degree branch of the 180 degree coupler (819) connects to the 90 degree coupler (845). The 0-degree branch of the 180-degree coupler (819) and the 2 branches of the in-phase coupler (820) are respectively connected with the 90-degree couplers (846), (847) and (848). The 90-degree branch of the 90-degree coupler (845) is connected with a power divider (859). The 0-degree branch of the 90-degree coupler (845) is connected with the power divider (862). The 90-degree branches of the 90-degree couplers (846), (847) and (848) are respectively connected with power dividers (857), (861) and (863). The 0 degree branches of the 90 degree couplers (846), (847) and (848) are respectively connected with the power dividers (858), (860) and (864).

2 branches of the power divider (807) are respectively connected with a 180-degree coupler (821) and an in-phase coupler (822). The 180 degree branch of the 180 degree coupler (821) is connected with the 90 degree coupler (849). The 0 degree branch of the 180 degree coupler (821) and the 2 branches of the in-phase coupler (822) are respectively connected with the 90 degree couplers (850), (851) and (852). And a 90-degree branch of the 90-degree coupler (849) is connected with the power divider (858). And a 0-degree branch of the 90-degree coupler (849) is connected with a power divider (863). The 90-degree branches of the 90-degree couplers 850, 851 and 852 are respectively connected with power dividers 860, 862 and 864. The 0 degree branches of the 90 degree couplers (850), (851) and (852) are respectively connected with power dividers (857), (859) and (861).

2 branches of the power divider (808) are respectively connected with a 180-degree coupler (823) and an in-phase coupler (824). The 180 degree branch of the 180 degree coupler (823) is connected with the 90 degree coupler (853). The 0-degree branch of the 180-degree coupler (823) and the 2 branches of the in-phase coupler (824) are respectively connected with 90-degree couplers (854), (855) and (856). And a 90-degree branch of the 90-degree coupler (853) is connected with a power divider (857). And a 0-degree branch power divider (864) of the 90-degree coupler (853). The 90-degree branches of the 90-degree couplers (854), (855) and (856) are respectively connected with power dividers (859), (861) and (863). The 0 degree branches of the 90 degree couplers (854), (855) and (856) are respectively connected with power dividers (858), (860) and (862).

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An air interface test device is characterized in that,

the device comprises a power division unit and a phase shift unit connected with the power division unit so as to provide non-interfering transmission channels;

the power dividing unit comprises N first ports and M second ports, the phase shifting unit comprises M third ports and N fourth ports, one second port is connected with one third port to form M phase shifting branches, so that one first port is connected with one terminal, one fourth port is connected with one antenna port of the test base station, or one fourth port is connected with one terminal, and one first port is connected with one antenna port of the test base station; wherein M is greater than N; both M and N are integers greater than 2;

the phase shift unit includes at least two hybrid couplers, and is configured to perform phase shift on a signal input to the power division unit via one phase shift branch corresponding to each element or a signal output to one phase shift branch corresponding to each element by the power division unit according to a mapping relationship between each element in an orthogonal matrix of a phase and a phase shift degree, so as to obtain a phase-shifted signal.

2. The apparatus of claim 1,

3. The device according to claim 1 or 2,

the power division unit comprises at least two power dividers;

4. The device according to claim 1 or 2,

5. An air interface test system is characterized in that,

the system comprises the air interface test device of any one of claims 1 to 4, a test base station and a terminal;

the air interface test device comprises N first ports and N fourth ports, wherein one first port is connected with one terminal, and one fourth port is connected with one antenna port of the test base station; or one fourth port is connected with a terminal, and one first port is connected with an antenna port of the test base station.

6. An air interface test method, which is applied to the air interface test device according to any one of claims 1 to 4, the method comprising:

receiving an uplink signal sent by a terminal;

dividing each of the uplink signals into N uplink components;

performing phase offset processing on each uplink component, and performing phase offset on the uplink component passing through one phase-shifting branch corresponding to each element according to the mapping relation between each element in the orthogonal matrix of the phase and the phase offset degree during the phase offset processing to obtain the phase-offset uplink component;

dividing the N downlink signals subjected to beam forming into M downlink components and performing phase offset processing on the M downlink components, and performing phase offset processing on the downlink components of one phase shift branch corresponding to each element according to the mapping relation between each element in an orthogonal matrix of the phase and the phase offset degree when performing the phase offset processing to obtain phase-offset downlink components;

and performing signal synthesis processing on the M downlink components subjected to the phase offset processing, and then sending the M downlink components to a terminal so that the terminal can determine the orthogonal beam forming effect of the test base station.

7. The method of claim 6,

8. An air interface test method, which is applied to the air interface test system of claim 5, the method comprising:

the test terminal sends an uplink signal;

the air interface test device receives the uplink signals, divides each uplink signal into N uplink signal components, performs phase offset processing on each uplink component, and performs phase offset processing on the uplink signal component passing through a phase shift branch corresponding to each element according to the mapping relation between each element in an orthogonal matrix of the phase and the phase offset degree during the phase offset processing to obtain the phase-offset uplink component;

the air interface testing device sends the uplink component subjected to the phase offset processing to N antenna ports of a testing base station;

a test base station receives an uplink signal sent by a terminal;

the air interface test device divides each downlink signal generated according to beamforming into N downlink components, performs phase offset processing on each downlink component, and performs phase offset processing on the downlink component passing through a phase shift branch corresponding to each element according to the mapping relation between each element in an orthogonal matrix of the phase and the phase offset degree when performing the phase offset processing to obtain the phase-offset downlink component;

the air interface testing device synthesizes signals of the downlink components subjected to the phase offset processing and sends the signals to a terminal;

and each terminal receives the downlink signal so as to determine the orthogonal beamforming effect of the test base station according to the downlink signal.

9. The method of claim 8,